package org.csmz.class2333.collection;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class Example05 {
    public static void main (String[] args){
        Map<String,Integer> map=new HashMap<>();
        map.put("铅笔",10);
        map.put("橡皮",5);
        map.put("钢笔",45);
        map.put("墨水",15);
        Set<String> keys = map.keySet();
        System.out.println("1.用第一种方法遍历Map集合");
        for (String key : keys){
            Integer value = map.get(key);
            System.out.println(key+"->"+value);
        }
        Set<Map.Entry<String,Integer>> entries=map.entrySet();
        System.out.println("2.用第二种方法遍历Map集合");
        for (Map.Entry<String,Integer> entry:entries){
            String key = entry.getKey();
            Integer value = entry.getValue();
            System.out.println(key+"->"+value);
        }
    }
}
